?? 基于visual c++的gdi常用坐標系統及應用 (3).htm
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<DIV align=center><B><IMG alt=基于VisualC++的GDI常用坐標系統及應用(3)
src="基于Visual C++的GDI常用坐標系統及應用 (3).files/2671452568.gif"
border=1><BR>圖十一、MM_LOENGLISH</B><B>映射模式下的坐標系</B></DIV></TD></TR></TBODY></TABLE>
<DIV> 此外，度量單位改為0.01英寸，這意味著你提供的坐標將除以100，觀察上述代碼的MM_LOENGLISH映射效果</DIV>
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<DIV>void CExoDraw1View::OnPaint() </DIV>
<DIV>{</DIV>
<DIV> CPaintDC dc(this); // device context for painting</DIV>
<DIV> dc.SetMapMode(MM_LOENGLISH);</DIV>
<DIV> dc.SetViewportOrg(380, 220);</DIV>
<DIV> . . .</DIV>
<DIV>}</DIV></TD></TR></TBODY></TABLE><BR></DIV>
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<DIV align=center><B><IMG alt=基于VisualC++的GDI常用坐標系統及應用(3)
src="基于Visual C++的GDI常用坐標系統及應用 (3).files/2222770685.gif"
border=1><BR>圖十二、代碼效果圖</B></DIV></TD></TR></TBODY></TABLE>
<DIV> 正如你所看到的，直線現在位于坐標系的第一象限，同時，直線比以前縮短，圓也比以前的要小。</DIV>
<DIV> 與MM_LOENGLISH映射模式相似，MM_HIENGLISH映射模式也是垂直坐標軸正向向上，只是它以0.001英寸為坐標單位，下面是它的效果：</DIV>
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<DIV>void CExoDraw1View::OnPaint() </DIV>
<DIV>{</DIV>
<DIV> CPaintDC dc(this); // device context for painting</DIV>
<DIV> dc.SetMapMode(MM_HIENGLISH);</DIV>
<DIV> dc.SetViewportOrg(380, 220);</DIV>
<DIV> . . . Same as previous</DIV>
<DIV>}</DIV></TD></TR></TBODY></TABLE><BR>
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<DIV align=center><B><IMG alt=基于VisualC++的GDI常用坐標系統及應用(3)
src="基于Visual C++的GDI常用坐標系統及應用 (3).files/1003829713.gif"
border=1><BR>圖十三、代碼效果圖</B></DIV></TD></TR></TBODY></TABLE> </DIV>
<DIV> MM_LOMETRIC映射模式使用與上兩種映射模式相同的坐標軸，不同的是MM_LOMETRIC使用0.1毫米為單位，下面是一個例子：</DIV>
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<TABLE borderColor=#ffcc66 width="90%" align=center bgColor=#dadacf
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<DIV>void CExoDraw1View::OnPaint() </DIV>
<DIV>{</DIV> CPaintDC dc(this); // device context for painting
<DIV> dc.SetMapMode(MM_LOMETRIC);</DIV>
<DIV> dc.SetViewportOrg(380, 220);</DIV>
<DIV> . . .</DIV>
<DIV>}</DIV></TD></TR></TBODY></TABLE></DIV><BR>
<TABLE width="90%" align=center border=0>
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<DIV align=center><IMG alt=基于VisualC++的GDI常用坐標系統及應用(3)
src="基于Visual C++的GDI常用坐標系統及應用 (3).files/355256048.gif"
border=1><BR><B>圖十四、代碼效果圖</B></DIV></TD></TR></TBODY></TABLE>
<DIV><BR> MM_HIMETRIC使用與上述三種映射模式相同的坐標系，但它的坐標單位是0.01毫米，下面例子代碼如下：</DIV>
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<TABLE borderColor=#ffcc66 width="90%" align=center bgColor=#dadacf
border=1>
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<DIV>void CExoDraw1View::OnPaint() </DIV>
<DIV>{</DIV>
<DIV> CPaintDC dc(this); // device context for painting</DIV>
<DIV> dc.SetMapMode(MM_HIMETRIC);</DIV>
<DIV> dc.SetViewportOrg(380, 220);</DIV>
<DIV> . . . Same as previous</DIV>
<DIV>}</DIV></TD></TR></TBODY></TABLE><BR></DIV>
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<DIV align=center><B><IMG alt=基于VisualC++的GDI常用坐標系統及應用(3)
src="基于Visual C++的GDI常用坐標系統及應用 (3).files/3267253666.gif"
border=1><BR>圖十五、代碼效果圖</B> </DIV></TD></TR></TBODY></TABLE>
<DIV> MM_TWIPS映射模式將每個邏輯單位（像素）除以20，實際上一twip等于1/1440 英寸，坐標系統仍然與上面幾種映射方式相同。</DIV>
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<TABLE borderColor=#ffcc66 width="90%" align=center bgColor=#dadacf
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<DIV>void CExoDraw1View::OnPaint() </DIV>
<DIV>{</DIV>
<DIV> CPaintDC dc(this); // device context for painting</DIV>
<DIV> CRect Recto;</DIV>
<DIV> dc.SetMapMode(MM_TWIPS);</DIV>
<DIV> dc.SetViewportOrg(380, 220);</DIV>
<DIV> . . .</DIV>
<DIV>}</DIV></TD></TR></TBODY></TABLE></DIV><BR>
<TABLE width="90%" align=center border=0>
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<DIV align=center><B><IMG alt=基于VisualC++的GDI常用坐標系統及應用(3)
src="基于Visual C++的GDI常用坐標系統及應用 (3).files/3883170230.gif"
border=1><BR>圖十六、代碼效果圖</B></DIV></TD></TR></TBODY></TABLE></DIV>
<DIV></DIV>
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